Password Strength Checker

Analyze the complexity, bits of entropy, warnings, and estimated cracking resistance of your password.

Understanding Password Entropy

Entropy measures the unpredictability of a password. A higher entropy score (measured in bits) represents greater complexity, making it significantly harder for malicious programs or brute-force engines to guess the password.

For high security, aim for an entropy score of at least 80 bits. You can easily achieve this by increasing the overall character count of your password or introducing a mix of capital letters, numerical symbols, and non-alphanumeric special characters.

Frequently Asked Questions

How is password strength measured?

Strength is evaluated by checking character entropy, length, variations, and common dictionary pattern matches. Your password is never sent to a server.

What is a strong password?

A strong password is at least 12-16 characters long and includes a cryptographically random combination of uppercase, lowercase, digits, and symbols.

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